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Assassin’s Creed Hidden Blade

Stalk and kill your target like Ezio with this functioning Assassin’s Creed inspired hidden blade; with the flick of the wrist, the replica assassin blade will spring outward. Perfect for cosplay, these life size hidden blades are officially licensed.

Adrian Fall 3 or 4 happened after da Vinci, yes? Assuming that they are the same order/brotherhood of assassins, wouldn't they already have da Vinci's technology from the previous games?
But hey, what do I know, I don't play the series.

below or above the eutectic point of the iron-carbide phase diagram (iron-carbide = steel at eutectic point broheim), steel loses much strength and has too much ductility; common names for these are cast iron and wrought iron. you would not want a blade made of either one; it would either shatter upon contact with anything moderately dense, or it would be so ductile it would bend due to its own weight.

but you can also temper the steel, add martensites, cold work your steel, add solid solutions (diffuse through interstitial sites), add precipitates (which diffuse through grain boundaries, dislocation boundaries, and substitution sites), or even add fibers to fortify your metal. ceramics are great solid solutions and precipitates to create some steel with a great young's modulus and poissons ratio.
TL;DR lrn2engineer

Props Danny for saying a bunch of nonsense that makes you look like you have a clue how metal forging works. I would like to point out something for you though...iron is not the same as steel. Steel is made from iron, but iron is just iron. Caste iron is simply that...iron poured into a casting. There is no strengthening involved. Wrought iron HAS been strengthened through the inclusion of slag. It is still not steel. Caste iron is made for things like skillets and pots. Wrought iron is used for fences, decorative metalwork, and construction (the Eiffel Tower is a kind of wrought iron). Steel and iron are not the same thing. Great posts of useless information that no one but knife nerds and blacksmiths care about...

oh, and you say nonsense; what did i say that is not true? also, you do realize carbide is carbon (thus the iron-carbide phase diagram is percent of iron and carbide [iron plus carbon equals steel!! ..so iron isn't steel?! wow!])

I've seen a bunch of these all of the internet, most of which don't come with the wrist straps, etc. and just the steel blade. Anyone know if this actually comes with the right materials to actually wear this thing?